Hi I appreciate your concern for your grandson who is diagnosed to have bilateral undescended testes or cryptorchidism. It is a condition when one or both of the testes have not descended into the scrotum at birth, but stay in the abdomen or only move part way down into the scrotum. Usually the testicles descend on their own by 6 months. Since the scrotum provides cooler environment that is essential for the function of the testicles so they need to be relocated as the undescended testes may cause fertility issues or testicular cancer in the future. You are advised to consult a general surgeon/urologist for the laparascopic or open surgery to correct the defect and to relocate the testicles into the scrotum (orchiopexy). Earlier is better, surgery before 1 year of age lowers the risk of complications of an undescended testicle, such as infertility and testicular cancer. Hope this answers your query. A feedback is appreciated.